HP Difference: 93 v. 104 u/l octane?

JSH · 04-06-2021, 05:35 PM

I'm going to have these two tunes prepared for my car, but I have never tested any engine and compared pump gas to race gas hp. In this case, it's 93 v. 104u/l. I wondering if anyone here has or knows a shop that has performed such tests? Do you have an opinion of what these dynos would show?

BruceWayne1LE · 04-06-2021, 07:49 PM

The car from the factory is tuned for 93. 100octane 200octane 500 octane won’t make any difference. Considering that your car is stock tune. But looking at your profile seems like you have tuned for your mods. Higher octane really just allows more timing. In tune means more HP.

Joshinator99 · 04-06-2021, 08:05 PM

Quote:

Originally Posted by JSH

I'm going to have these two tunes prepared for my car, but I have never tested any engine and compared pump gas to race gas hp. In this case, it's 93 v. 104u/l. I wondering if anyone here has or knows a shop that has performed such tests? Do you have an opinion of what these dynos would show?

Quote:

Originally Posted by BruceWayne1LE

The car from the factory is tuned for 93. 100octane 200octane 500 octane won’t make any difference. Considering that your car is stock tune. But looking at your profile seems like you have tuned for your mods. Higher octane really just allows more timing. In tune means more HP.

I’d guess 40+ WHP by running race gas. Should be good for a few degrees of timing for sure.

crosive · 04-06-2021, 09:54 PM

Quote:

Originally Posted by Joshinator99

I’d guess 40+ WHP by running race gas. Should be good for a few degrees of timing for sure.

a shop local to me claims 30-40 whp gains on their dyno on the lt4 engine regardless of car or transmission just by popping some 100 in there, but doesn't see any difference from 100-110.

I don't have any reason to not believe them, but it does seem to be a bit proud

Joshinator99 · 04-06-2021, 10:14 PM

Quote:

Originally Posted by crosive

a shop local to me claims 30-40 whp gains on their dyno on the lt4 engine regardless of car or transmission just by popping some 100 in there, but doesn't see any difference from 100-110.

I don't have any reason to not believe them, but it does seem to be a bit proud

LT4’s see some knock retard on 93 bone stock, so doesn’t sound unrealistic to me IMO.

95 imp · 04-06-2021, 10:36 PM

IMO, you should be running higher than 93 octane in your motor. Keep adding octane until the KS stop picking it up. 1 gal of xylene to 10 gal of pump gas will raise octane 2 points.
(91-->93. 93-->95)

Or, obviously, 5:1 will raise it 4 points

Keep adding a gallon to creep up on the actual amount you need to stop knocking and add 1 more point for insurance and that's what your engine should be drinking.

Any higher octane than necessary is a waste of money, fuel, and lowers power.

NA18CamaroSS · 04-07-2021, 12:45 AM

Add a flex fuel sensor, tune for 93 and E85, and call it a day.

Jeb114 · 04-07-2021, 07:16 AM

Gasoline does not create Horsepower. It supports the Horsepower the engine has built into it. Thru ignition.

JSH · 04-07-2021, 11:52 AM

These results are on a Gearhead Automotive Performance tuned 2016 Ford twin-turbo 3.5L V6. We'll put it on the dyno soon and find out:

04-06-2021, 05:35 PM	#1
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 3,556	HP Difference: 93 v. 104 u/l octane? I'm going to have these two tunes prepared for my car, but I have never tested any engine and compared pump gas to race gas hp. In this case, it's 93 v. 104u/l. I wondering if anyone here has or knows a shop that has performed such tests? Do you have an opinion of what these dynos would show? __________________ '20 ZL1 1LE A10, OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next.

04-06-2021, 07:49 PM	#2
BruceWayne1LE Drives: 2018 Camaro SS 1LE M6 Join Date: Oct 2018 Location: Northern California Posts: 345	The car from the factory is tuned for 93. 100octane 200octane 500 octane won’t make any difference. Considering that your car is stock tune. But looking at your profile seems like you have tuned for your mods. Higher octane really just allows more timing. In tune means more HP. __________________ Camaro 2SS 1LE, MBRP Catback, Mishimoto Catch Can, Rotofab dry, TSP1 7/8” headers,DSX FF, Pray ported MSD, 95mm TB 492WHP 473WTQ

04-06-2021, 10:36 PM	#6
95 imp Dumb Ass Deluxe Drives: A Tricked Out Mountain Bike Join Date: Jun 2019 Location: Arizona Posts: 1,959	IMO, you should be running higher than 93 octane in your motor. Keep adding octane until the KS stop picking it up. 1 gal of xylene to 10 gal of pump gas will raise octane 2 points. (91-->93. 93-->95) Or, obviously, 5:1 will raise it 4 points Keep adding a gallon to creep up on the actual amount you need to stop knocking and add 1 more point for insurance and that's what your engine should be drinking. Any higher octane than necessary is a waste of money, fuel, and lowers power. __________________

04-07-2021, 12:45 AM	#7
NA18CamaroSS Drives: 2018 Chevrolet Camaro 2SS 1LE 6M Join Date: Jul 2019 Location: California Posts: 283 View My Garage	Add a flex fuel sensor, tune for 93 and E85, and call it a day. __________________ Bolt-ons.

04-07-2021, 11:52 AM	#9
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 3,556	These results are on a Gearhead Automotive Performance tuned 2016 Ford twin-turbo 3.5L V6. We'll put it on the dyno soon and find out: Attached Images __________________ '20 ZL1 1LE A10, OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next.

04-07-2021, 07:16 AM	#8
Jeb114 Drives: 2021 300 Join Date: Jan 2015 Location: New Jersey Posts: 968	Gasoline does not create Horsepower. It supports the Horsepower the engine has built into it. Thru ignition.

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